Refactor GitHub Actions build workflow

Updated build workflow to clean apt cache before installation and removed unnecessary steps.

Author: csharpfritz

.github/workflows/build.yml

@@ -16,6 +16,7 @@ jobs:
         run: |
           sudo rm -f /etc/apt/apt-mirrors.txt
           echo "deb http://archive.ubuntu.com/ubuntu noble main restricted universe multiverse" | sudo tee /etc/apt/sources.list
+          sudo apt-get clean
           sudo apt-get update
           sudo apt-get install aptitude
           sudo aptitude install -y libwebp-dev
@@ -86,3 +87,4 @@ jobs:
 
 
 
+